path: root/libexec_getenv_last.c

/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST


const char *
libexec_getenv_last(struct libexec_command *cmd, const char *name)
{
	char **env;
	size_t i, len;
	const char *ret = NULL;

	if (!cmd || !name) {
		errno = EINVAL;
		return NULL;
	}

	if (strchr(name, '='))
		return NULL;

	env = cmd->environ ? cmd->environ : environ;
	len = strlen(name);

	for (i = 0; env[i]; i++)	
		if (!strncmp(env[i], name, len) && env[i][len] == '=')
			ret = &env[i][len + 1];

	return ret;
}


#else


int
main(void)
{
	struct libexec_command cmd, ref;
	char **env;

	cmd = LIBEXEC_COMMAND_INIT;
	memcpy(&ref, &cmd, sizeof(cmd));

	env = environ;
	environ = calloc(12, sizeof(*environ));
	ASSERT_NOT_NULL(environ);
	environ[0] = strdup("AA=aa");
	environ[1] = strdup("A=a0");
	environ[2] = strdup("B=b0");
	environ[3] = strdup("A=a1");
	environ[4] = strdup("B=b1");
	environ[5] = strdup("A=a2");
	environ[6] = strdup("B=b2");
	environ[7] = strdup("A=a3");
	environ[8] = strdup("B=b3");
	environ[9] = strdup("BB=bb");
	environ[10] = strdup("X=Y=Z");
	ASSERT_NOT_NULL(environ[0]);
	ASSERT_NOT_NULL(environ[1]);
	ASSERT_NOT_NULL(environ[2]);
	ASSERT_NOT_NULL(environ[3]);
	ASSERT_NOT_NULL(environ[4]);
	ASSERT_NOT_NULL(environ[5]);
	ASSERT_NOT_NULL(environ[6]);
	ASSERT_NOT_NULL(environ[7]);
	ASSERT_NOT_NULL(environ[8]);
	ASSERT_NOT_NULL(environ[9]);
	ASSERT_NOT_NULL(environ[10]);
	ASSERT_IS_NULL(environ[11]);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "PATH"));
	ASSERT_IS_TRUE(errno == 0);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(NULL, "x"));
	ASSERT_EQ_INT(errno, EINVAL);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "x"));
	ASSERT_IS_TRUE(errno == 0);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, NULL));
	ASSERT_EQ_INT(errno, EINVAL);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "X=Y"));
	ASSERT_IS_TRUE(errno == 0 || errno == EINVAL);

	errno = 0;
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, ""));
	ASSERT_IS_TRUE(errno == 0);

	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "X"), "Y=Z");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "AA"), "aa");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "BB"), "bb");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "A"), "a3");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "B"), "b3");

	ASSERT_IS_TRUE(!memcmp(&cmd, &ref, sizeof(cmd)));
	libexec_destroy_command(&cmd);

	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "PATH"));
	ASSERT_IS_NULL(libexec_getenv_last(NULL, "x"));
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "x"));
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, NULL));
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, "X=Y"));
	ASSERT_IS_NULL(libexec_getenv_last(&cmd, ""));
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "X"), "Y=Z");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "AA"), "aa");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "BB"), "bb");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "A"), "a3");
	ASSERT_EQ_STR(libexec_getenv_last(&cmd, "B"), "b3");

	libexec_set_environ(&cmd, environ);
	environ = env;

	return 0;
}


#endif